.switch {
  margin-left: 200px;
  margin-bottom: 20px;
}
.cars {
  position: relative;
  font-size: 18px;
  margin-bottom: 50px;
  top: 20%;
  left: 20%;
}
.echartStyle {
  width: 700px;
  height: 500px;
  margin-left: 200px;
}
